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2 2′-Azobisisobutyronitrile(AIBN) is a white columnar crystal or a white powdery crystal. Do not dissolve in water, soluble in methanol, hot ethanol, benzene, toluene, slightly soluble in ethanol. Explosion occurs when dissolved in acetone and heptane.
AIBN is a particularly outstanding free radical:
1. Its decomposition temperature (65 ~ 85 ° C) is suitable for most reactions;
2. Its primary decomposition rate is less variable for different solvents;
3, not susceptible to free radical attack, so induced decomposition and transfer reactions can be ignored;
4. It can also be decomposed by light at lower temperatures.

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